The development of inorganic filling polypropylene load material is very rapid, because the addition of inorganic fillers reduces the shrinkage rate of plastic products, improves dimensional stability, overcomes warpage deformation of products, while the heat resistance and stiffness of products are also obtained, reducing costs, commonly used inorganic fillers are talcum powder, calcium carbonate and so on.

Due to the difference of properties between inorganic fillers and plastics and their affinity, with the addition of fillers, the elongation at break, impact toughness and fluidity of materials will go down the well, which will bring difficulties to material design and product teaching..

Barium sulfate filled polypropylene is a new kind of composite material with high filling, high rigidity, high toughness and high elongation. It is better to have new physical mechanics.